﻿using System.Collections.Generic;
using System.Linq;
using ZhonTai.Admin.Domain.Api;
using ZhonTai.Admin.Core.Attributes;

namespace ZhonTai.Admin.Core.Logs
{
    /// <summary>
    /// Api帮助类
    /// </summary>
    [SingleInstance]
    public class ApiHelper
    {
        private List<ApiHelperDto> _apis;
        private static readonly object _lockObject = new();

        private readonly IApiRepository _apiRepository;
        public ApiHelper(IApiRepository apiRepository)
        {
            _apiRepository = apiRepository;
        }

        public List<ApiHelperDto> GetApis()
        {
            if (_apis != null && _apis.Any())
                return _apis;

            lock (_lockObject)
            {
                if (_apis != null && _apis.Any())
                    return _apis;

                _apis = new List<ApiHelperDto>();

                var apis = _apiRepository.Select.ToList(a => new { a.Id, a.ParentId, a.Label, a.Path });

                foreach (var api in apis)
                {
                    var parentLabel = apis.FirstOrDefault(a => a.Id == api.ParentId)?.Label;

                    _apis.Add(new ApiHelperDto
                    {
                        Label = parentLabel.NotNull() ? $"{parentLabel} / {api.Label}" : api.Label,
                        Path = api.Path?.ToLower().Trim('/')
                    });
                }

                return _apis;
            }
        }
    }

    public class ApiHelperDto
    {
        /// <summary>
        /// 接口名称
        /// </summary>
        public string Label { get; set; }

        /// <summary>
        /// 接口地址
        /// </summary>
        public string Path { get; set; }
    }
}